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Step * 2 1 1 of Lemma all-nsub2


1. [P] : ℕ2 ⟶ ℙ
2. P[0] ∧ P[1]@i
3. x : ℕ2@i
4. x = 0 ∈ ℤ
⊢ P[0]
BY
{ Auto }

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Latex:

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Latex:

1.  [P]  :  \mBbbN{}2  {}\mrightarrow{}  \mBbbP{}
2.  P[0]  \mwedge{}  P[1]@i
3.  x  :  \mBbbN{}2@i
4.  x  =  0
\mvdash{}  P[0]


By

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Latex:
Auto

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